F5
101 · Question #528
101 Question #528: Real Exam Question with Answer & Explanation
The correct answer is B: Active FTP. In Active FTP mode, the server initiates the data connection back to the client on a port the client specifies, distinguishing it from Passive FTP where the client initiates both connections.
Question
In which FTP mode is the serve, responsible for initiating the data correction back to the client?
Options
- AProtected FTP
- BActive FTP
- CSecure FTP
- DPassive FTP
Explanation
In Active FTP mode, the server initiates the data connection back to the client on a port the client specifies, distinguishing it from Passive FTP where the client initiates both connections.
Common mistakes.
- A. Protected FTP is not a standard FTP operational mode that defines who initiates the data connection.
- C. Secure FTP (SFTP or FTPS) refers to encrypted FTP variants and is not a mode that describes the direction of data connection initiation.
- D. In Passive FTP, the client initiates both the control and data connections to server-provided ports, which is the opposite of the scenario described.
Concept tested. Active vs Passive FTP data connection initiation
Reference. https://www.rfc-editor.org/rfc/rfc959
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